Royal birthday

Britain's Catherine, Duchess of Cambridge meets guests at the Patron's Lunch, a special street party outside Buckingham Palace in London as part of the three day celebrations for Queen Elizabeth II's official 90th birthday.

Britain's Prince Harry speaks to guests at the Patron's Lunch, a special street party outside Buckingham Palace in London as part of the three day celebrations for Queen Elizabeth II's official 90th birthday.

A pigeon flies ahead of Britain's Queen Elizabeth and Prince Philip, and Princes William Harry and Kate Duchess of Cambridge behind as they wave to guests attending the Patron's Lunch on the Mall, an event to mark her 90th birthday, in London

Britain's Queen Elizabeth II and Britain's Prince Philip, Duke of Edinburgh wave to guests from thier car as they attend the Patron's Lunch on the Mall, an event to mark her official 90th birthday in London